Well, I just joined the club. And the forum! Antec TP 550 EPS died.

[PCBONEZ]

Re: Well, I just joined the club. And the forum! Antec TP 550 EPS died.

bonez, that's a coil that's part of output pi filter...

HOG WASH
The toroidal coils are NOT the PI filter inductors.
i4004, you need to stick to something you know about, like antique TV's.

The output PI filter inductors are circled in yellow.

[i4004]

Re: Well, I just joined the club. And the forum! Antec TP 550 EPS died.

you know about element markings on the pcb, right?
what letter is used to mark those things u call "torroidal transformers"?
and what letter is used to mark 2 "other"(hehe) transformers?

anybody home, bonez?
put more of that medicine on your moustache, it's making you silly beyond belief!


oh yeah
>"Should be" ?
It is, that's exactly what I said.

i was talking to corbin. look
"corbin, uc3845 should be main supply pwm controller, not the 5vstby's...."
see?

[PCBONEZ]

Re: Well, I just joined the club. And the forum! Antec TP 550 EPS died.

A Torroid with 2+ windings is a Transformer whether you like it or not i4004.
.

[PCBONEZ]

Re: Well, I just joined the club. And the forum! Antec TP 550 EPS died.

I mentioned the Toroidal Transformer as point of reference to assist corbin in locating on the PCB where I was talking about.

Your useless erroneous argumentative BULLSHIT is helping NO ONE.
.

[i4004]

Re: Well, I just joined the club. And the forum! Antec TP 550 EPS died.

>I mentioned the Toroidal Transformer as point of reference to assist corbin in locating on the PCB where I was talking about.

no, you just wanted a fight with me.
now that you've lost it you're using excuses.

essentially your piece about coil being trafo is just a spam in this thread.

stop making clown out of yourslef and let the man answer questions which might actually help him.

read the remainder of the thread to learn something about troubleshooting psus.

basics of electronics lesson you just attended ends now.

[PCBONEZ]

Re: Well, I just joined the club. And the forum! Antec TP 550 EPS died.

>I mentioned the Toroidal Transformer as point of reference to assist corbin in locating on the PCB where I was talking about.

no, you just wanted a fight with me.
now that you've lost it you're using excuses.

You are full of shit Idiot4004. - That one is a flat out lie.
And ~EVERYONE~ can see it. - You are fooling no one!

I was giving corbin the PCB layout and you picked through it to find something to start an argument about just for the hell of it.

It is self evident by your behavior that your SOLE purpose in being here is to start arguments.
It's certainly NOT to actually help anyone.
No one [except you] believes that you are here to help. - For good reason.

.

[370forlife]

Re: Well, I just joined the club. And the forum! Antec TP 550 EPS died.

Hey hey hey hey

settle down now you two.

[clcorbin]

Re: Well, I just joined the club. And the forum! Antec TP 550 EPS died.

so you have 300v being supplied to that oki chip, yet nothing appears on 5vstby trafo(it's the smaller trafo of the two)?
where did you see 10khz signals? they end on mosfet? checked that mosfet?
should be mosfet that supplies 5vstby's primary.

The 10khz signal is generated by the oki50 chip and is present at the gate of the MOSFET. The duty-cycle is only 16usec, so there is no way it is turning that FET on. I don't have an isolation transformer, so I don't want to hook my scope up to the nonisolated AC/DC on this side of the board to get more information on what is coming out of that chip.

by pwm ic do you mean oki or uc? they should both be makinbg pwm pulses, if oki indeed is chip that's making oscillations on primary side of 5vstby trafo..

I have not tested the other chip at this point. If the oki50 is for the standby, then I am looking in the right place at this time.

again, pix would be handy....esp. around 5vstby supply...and that oki chip...

Sorry about that. Both digital cameras where out of the house yesterday and didn't get back until this afternoon. I'll take some pics and see if I can do half as good a job as some of you at labeling things to better explain what I have measured and where those signals were.

[i4004]

Re: Well, I just joined the club. And the forum! Antec TP 550 EPS died.

oki-dokey..
<wink>

if it can't trigger the fet you should check passive components around it and pray it's not ic itself, as it's seems it's some custom job (if oki50 is all that's written on it)

something else; perhaps it's latched into protection as a result of short on secondary, or even trafo windings...

[PCBONEZ]

Re: Well, I just joined the club. And the forum! Antec TP 550 EPS died.

I have several TP and TP2 here to look at and none of them have an Oki IC.

Where is it on the PCB?
It may be something with alternate parts in production.

[clcorbin]

Re: Well, I just joined the club. And the forum! Antec TP 550 EPS died.

I might have a winner: shorted primary on standby transformer. I pulled it out to measure the resistance on the primary and secondary sides and this is what I got:

Secondary: 0.32 ohms.
Primary 1: 0.53 ohms.
Primary 2: 1.65 ohms.

Do these numbers sound even close to normal?

Here are a few pics with some labels to clarify things some (I hope):

Here is the back of the board with the labels


Here is a shot of where the standby transformer used to be. Note hot spots around diode D20


Different angle of the standby transformer's location to show the other diodes around it


While the transformer was out, I also ohmed out the two pair of primary pads. The pads for both pair of windings showed completely open. I also tested the six diodes around this transformer and they all tested as good, even the one that appears to have been very hot.

After powering up the supply with the transformer out, I was seeing the 324VDC at the pad for one leg of the primary coil and I could hear a bit of electronic humming going on (I generally have better than average hearing). I went ahead and soldered the transformer back in to verify the voltage readings at the primaries and secondaries and got this:

324VDC at pads P1a and P1b (in and out of the first primary coil)
0VDC at pads P2a and P2b (in and out of the second primary coil)
0VD at pads S1a and S1b (while there are four pins on the secondary side, they are wired together in pairs by the transformer and by the PCB)

For the record, all of my DC voltages where measured relative to the point labeled "DC 1 REF" (aka: ground). The voltage on the secondary coil was measured across S1a to S1b.

Ideas?

[i4004]

Re: Well, I just joined the club. And the forum! Antec TP 550 EPS died.

>Do these numbers sound even close to normal?


hard to say without numbers from the working unit.
bonez should pull that trafo from his unit and measure it.

i have 3 supplies i'l be dismantling(pulling the caps and sending them to bonez, he likes used caps...) so i could check values on those....won't be done tomorrow, i'm afraid...
and it doesn't have to be relevant for you...

those burn marks are suspicious, yes, as there shouldn't be much load there(or overall on 5vstby supply).

(offtopic/ bonez, cy3 connects primary and secondary ground... <wink> /endofftopic)

[PCBONEZ]

Re: Well, I just joined the club. And the forum! Antec TP 550 EPS died.

i4004

I fail to see what CY3 has to do with anything at all here.
The only possible reason to bring it up is to instigate another arguement.

It is self evident by your behavior that your SOLE purpose in being here is to start arguments.

And just because you'd rather aquire your used caps from from dumpsters (or where ever) for free vs buying mine or KC8's doesn't me -we- like them.
Reusing old caps is totally YOUR thing.


clcorbin

I have plans tomorrow but I might be able to pull one of those transformers Monday.
What are the markings on it?
I have both TP and TP2 here in various watts and there should be an exact match in the mix somewhere.
.

[i4004]

Re: Well, I just joined the club. And the forum! Antec TP 550 EPS died.

>I have plans tomorrow

any plans to acquire some sense of humor?
all the teasing and jokes are flying right by you...
(psssstt: it's rhetorical..don't answer it...)

i won't tease you anymore...in this thread...hehe...
(but next time you say psu has toroidal trafo i will...such things deserve tease...)
(you don't have to address this either, just skip it...please...)

i pronounce our lil feud over. undoubtedly you'll soon repeat i use used caps(which is your fabrication...and a thing you seem to believe..you don't use it as a joke) and then i'll tease you again. untill you figure out the truth, which is that i don't.
i tease you because you're extremely stubborn.

cool off, already.

[clcorbin]

Re: Well, I just joined the club. And the forum! Antec TP 550 EPS died.

PCBONEZ,

The transformer is marked:

E216944 CWT 0519
09L190042-ON
Viking B-2 Class 130(B)

It looks like it is a custom transformer as I couldn't find much of anything about it online.

[clcorbin]

Re: Well, I just joined the club. And the forum! Antec TP 550 EPS died.

I'm not sure just how relevant it is, but I had a small standby transformer from another old power supply lying around (a couple of it's power transistors decided to go burn in hell). Both the primary and secondary coils measured around 0.3 ohms.

That's in the ball park with this one. They are totally different PC power supplies, but I would guess that most of the basic functions will be very similar just because they are all trying to do the exact same job.

Now I'm starting to wonder if that PWM IC has decided to pack it in or is latched due to an overload.

[Toasty]

Re: Well, I just joined the club. And the forum! Antec TP 550 EPS died.

Replace the 47uF cap and see if it comes back to life. Grab a close value from another supply if you have one. Up to 100uF would be okay, and a voltage at or above its present rating. Just to see if it comes back, then you can get the correct one.

I don't think an ohmmeter test of that transformer will reveal much unless you're getting a reading from the P1 pins to the P2 pins or either show a reading to the secondary, that may indicate a short. Or not. Without knowing how the transformer is wound, or manufacturers resistance specs, it is difficult to say.

Toast

[Toasty]

Re: Well, I just joined the club. And the forum! Antec TP 550 EPS died.

If the 5vsb is having a problem the PWM chip is doing its job by preventing the PSU from starting.

[PCBONEZ]

Re: Well, I just joined the club. And the forum! Antec TP 550 EPS died.

i4004
My plans are none of your business.
I do have a sense of humor but YOU never say anything funny.
PSU's DO have toroidal transformers, there's a photo of one earlier in the thread.
And YOU do NOT have the power to call the war over.
You are only permitted to surrender unconditionally.
.

[PCBONEZ]

Re: Well, I just joined the club. And the forum! Antec TP 550 EPS died.

PCBONEZ,

The transformer is marked:

E216944 CWT 0519
09L190042-ON
Viking B-2 Class 130(B)

It looks like it is a custom transformer as I couldn't find much of anything about it online.

I have that one. That PSU is already apart too.

0519 is just the date code. All the rest of the numbers are exact matches.

They are custom, they are built by or for CWT. [Channel Well Technologies]
CWT built most of the PSU's for Antec for several years.
.